Lubricating oil suitable for elevator guide rail

Abstract

The invention provides lubricating oil suitable for elevator guide rails, and belongs to the technical field of lubricating materials. The lubricating oil comprises the following components in parts by weight: 80-100 parts of base oil, 5-10 parts of a first anti-wear agent, 5-10 parts of a second anti-wear agent, 5-8 parts of an anti-aging agent, 15-20 parts of an anti-rust agent, 1-2 parts of a protein anti-freezing agent, 2-3 parts of an anti-foaming agent and 1-2 parts of a pour point depressant. The prepared lubricating oil can be used for elevator guide rails, and has the advantages of long service life, wear resistance and freezing resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating materials, and in particular to lubricating oil suitable for elevator guide rails. Background Art

[0002] At present, elevators have become an important product closely related to people's lives. Among them, elevator guide rails are important components for elevator quality control. The wear of elevator guide rails will directly affect the accuracy of the elevator and even cause the equipment to be scrapped prematurely. Therefore, elevator guide rails often use lubricating oil to reduce friction, avoid heat, and prevent mechanical wear.

[0003] The main properties of elevator guide rail lubricants are viscosity, oxidation stability and lubricity, which are closely related to the composition of lubricant fractions. Among them, viscosity is an important quality indicator that reflects the fluidity of lubricants, and different use conditions have different viscosity requirements. The viscosity index indicates the degree to which the viscosity of all fluids changes with temperature. The higher the viscosity index, the less the viscosity of the fluid is affected by temperature, the less sensitive the viscosity is to temperature, and it can be applied to different temperature environments. Therefore, the pursuit of lubricants with high viscosity index is the direction that the lubricant field has been working on. The composition of finished lubricants includes two major categories: base oil and additives. Base oil is an indispensable component of lubricants and determines the main properties of lubricants. At present, there are two main categories of lubricant base oils, mineral base oils and synthetic ester base oils. Mineral base oils often have a high pour point due to their high wax content, generally around -20°C, which cannot meet the use requirements of cold northern regions (below -30°C); while synthetic ester base oils have good designability and do not contain wax, and their comprehensive performance is more outstanding.

[0004] The lubricating effect of the elevator guide rail lubricant currently on the market is average, and it only plays a role in reducing friction. The service life of the lubricant is short and the price is relatively high.

[0005] In view of this, it is necessary to develop a lubricating oil suitable for elevator guide rails to improve the service life, wear resistance and antifreeze properties of the lubricating oil for elevator guide rails and make it more practical. Summary of the invention

[0006] The invention aims to provide a lubricating oil suitable for elevator guide rails, which has the advantages of long service life, wear resistance and antifreeze.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] The lubricating oil suitable for elevator guide rails provided by the present invention comprises the following components, calculated by weight: 80-100 parts of base oil, 5-10 parts of a first antiwear agent, 5-10 parts of a second antiwear agent, 5-8 parts of an antiaging agent, 15-20 parts of a rust inhibitor, 1-2 parts of a protein antifreeze agent, 2-3 parts of an antifoaming agent and 1-2 parts of a pour point depressant.

[0009] The base oil comprises 45% to 50% of Class III base oil, 30% to 35% of dipropylene glycol dibenzoate and 10% to 15% of trimethylolethane trinitrate, and also comprises 1 to 2 parts by weight of zinc dialkyl dithiophosphate.

[0010] Wherein, the first anti-wear agent is modified graphene oxide.

[0011] Furthermore, the specific preparation method of modified graphene oxide is as follows:

[0012] Graphene oxide and compounds containing boron, molybdenum, calcium, copper and rare earth elements are added into a container, and then added into petroleum ether, stirred and heated, and then concentrated sulfuric acid is added as a catalyst and reacted, and the temperature is raised to the boiling point of the solvent to evaporate the solvent, and the product is placed in a vacuum drying oven to dry, so as to obtain a modified graphene oxide anti-wear agent.

[0013] Wherein, the second anti-wear agent is a crystalline anti-wear agent.

[0014] Wherein, the antioxidant is nano ZnO or nano SiO2.

[0015] Wherein, the rust inhibitor is sodium petroleum sulfonate.

[0016] Further, the preparation method of the protein antifreeze agent is as follows:

[0017] Dissolve sericin with water, adjust the pH to 7.0-9.0 with NaOH solution, and maintain the temperature at 20-40°C; add trypsin to perform enzymatic hydrolysis for 2-3 hours. After the enzymatic hydrolysis is completed, heat the solution to 80-100°C and maintain it for 5-10 minutes to inactivate the enzyme; freeze-dry the obtained polypeptide solution to obtain a protein antifreeze agent.

[0018] Wherein, the antifoaming agent is polyoxyethylene polyoxypropanolamine ether.

[0019] Wherein, the pour point depressant is 1-dodecylnaphthalene.

[0020] Furthermore, the lubricating oil suitable for elevator guide rails of the present invention includes the following components, calculated by weight: 80 to 100 parts of base oil, 5 to 10 parts of modified graphene oxide, 5 to 10 parts of crystalline antiwear agent, 5 to 8 parts of nano ZnO or nano SiO2, 15 to 20 parts of sodium petroleum sulfonate, 1 to 2 parts of protein antifreeze agent, 2 to 3 parts of polyoxyethylene polyoxypropanolamine ether and 1 to 2 parts of 1-dodecylnaphthalene.

[0021] Among them, two anti-wear agents are used. The addition of the first anti-wear agent modified graphene oxide can improve the wear resistance of the lubricating oil, and synergize with the crystalline anti-wear agent to produce a stronger wear resistance, thereby ensuring the anti-wear strength while saving costs.

[0022] Among them, the addition of protein antifreeze agent can improve the low-temperature ductility of the lubricating oil, thereby improving the antifreeze performance of the lubricating oil, so that the lubricating oil can still maintain a high lubrication effect at low temperatures.

[0023] Among them, the anti-aging agent nano ZnO or nano SiO2 enhances the viscosity of the lubricant, avoids the lubricant from flowing significantly on the elevator guide rail, and at the same time can improve the anti-aging performance of the lubricant and increase the service life of the lubricant for the elevator guide rail.

[0024] The second object of the present invention is to provide a method for preparing lubricating oil suitable for elevator guide rails, which has the same beneficial effects.

[0025] The second object of the present invention is achieved by the following technical solutions:

[0026] The present invention provides a method for preparing a lubricating oil suitable for elevator guide rails, comprising the following steps:

[0027] S1. The temperature of the reactor is controlled at 60-70 ° C, the first anti-wear agent, the second anti-wear agent, the anti-aging agent and the rust inhibitor are added to the reactor, and the reaction is stirred, and the material is placed in an ultrasonic instrument for ultrasonic dispersion for 1 to 2 hours. After the dispersion is complete, the solution is taken out for use;

[0028] S2. Add a pour point depressant and an antifoaming agent to the solution obtained in step S1, raise the temperature to 80 to 90° C., stir for 20 min, and obtain a mixed solution;

[0029] S3. The mixed solution obtained in step S2 is cooled to room temperature, a protein antifreeze agent is added thereto, and ultrasonic dispersion is performed for 30 to 50 minutes to obtain the lubricating oil for the elevator guide rail.

[0030] In summary, the present invention has the following beneficial effects:

[0031] The lubricating oil suitable for elevator guide rails provided by the present invention has two anti-wear agents added thereto. The addition of the first anti-wear agent, modified graphene oxide, can improve the wear resistance of the lubricating oil, and synergize with the crystal anti-wear agent to produce a stronger wear resistance, thereby ensuring the anti-wear strength and saving costs. The addition of the protein antifreeze agent can improve the low-temperature ductility of the lubricating oil, thereby improving the antifreeze performance of the lubricating oil, so that the lubricating oil can still maintain a high lubricating effect at low temperatures. The anti-aging agent, nano ZnO or nano SiO2, enhances the viscosity of the lubricant, avoids the lubricant from flowing significantly on the elevator guide rail, and can improve the anti-aging performance of the lubricant, thereby increasing the service life of the lubricating oil for the elevator guide rail. DETAILED DESCRIPTION

[0032] For ease of understanding, the application will be described more fully below, and preferred embodiments of the application are provided. However, the application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In the embodiment, if specific techniques or conditions are not indicated, the techniques or conditions described in the document in this area or according to the product specification are carried out. Reagents used or instruments that do not indicate manufacturers are conventional products that can be obtained through the market.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] Example 1

[0035] Lubricating oil suitable for elevator guide rails and preparation method thereof

[0036] Preparation of modified graphene oxide: 10 parts of graphene oxide and 0.5 parts of compounds containing boron, molybdenum, calcium, copper and rare earth elements are added into a container by mass, and then added into 20 parts of petroleum ether, stirred and heated, and then 0.5 parts of concentrated sulfuric acid is added as a catalyst and reacted, and the temperature is raised to the boiling point of the solvent to evaporate the solvent, and the product is placed in a vacuum drying oven to dry, so as to obtain a modified graphene oxide anti-wear agent.

[0037] Preparation of protein antifreeze agent: Dissolve 10 parts of sericin protein in appropriate amount of water by weight, adjust pH to 8.0 with 10M NaOH solution, and maintain the temperature at 40°C; add 0.05 parts of trypsin to carry out enzymatic hydrolysis for 2 hours. After the enzymatic hydrolysis is completed, heat the solution to 90°C and keep it for 10 minutes to inactivate the enzyme; freeze-dry the obtained polypeptide solution to prepare the protein antifreeze agent.

[0038] The composition includes the following components in parts by weight: 80 parts of base oil, 5 parts of modified graphene oxide, 5 parts of crystal anti-wear agent, 5 parts of nano ZnO, 15 parts of sodium petroleum sulfonate, 1 part of protein antifreeze agent, 2 parts of polyoxyethylene polyoxypropanolamine ether and 1 part of 1-dodecylnaphthalene.

[0039] A method for preparing lubricating oil suitable for elevator guide rails comprises the following steps:

[0040] S1. The reactor temperature was controlled at 70 ° C, the first anti-wear agent, the second anti-wear agent, the anti-aging agent and the rust inhibitor were added to the reactor, and the reaction was stirred, and the material was placed in an ultrasonic instrument for ultrasonic dispersion for 2 hours. After complete dispersion, the solution was removed for standby;

[0041] S2. Add a pour point depressant and an antifoaming agent to the solution obtained in step S1, raise the temperature to 90°C, and stir for 20 minutes to obtain a mixed solution;

[0042] S3. The mixed solution obtained in step S2 is cooled to room temperature, a protein antifreeze agent is added thereto, and ultrasonic dispersion is performed for 40 minutes to obtain the lubricating oil for the elevator guide rail.

[0043] Example 2

[0044] Lubricating oil suitable for elevator guide rails and preparation method thereof

[0045] The preparation of modified graphene oxide, the preparation of protein antifreeze agent, and the preparation method of lubricating oil suitable for elevator guide rails are the same as those in Example 1.

[0046] The difference lies in the differences in the components in the lubricating oil, which are as follows in this embodiment:

[0047] The invention comprises the following components in parts by weight: 100 parts of base oil, 10 parts of modified graphene oxide, 10 parts of crystal anti-wear agent, 8 parts of nano ZnO, 20 parts of sodium petroleum sulfonate, 2 parts of protein antifreeze agent, 3 parts of polyoxyethylene polyoxypropanolamine ether and 2 parts of 1-dodecylnaphthalene.

[0048] Example 3

[0049] Lubricating oil suitable for elevator guide rails and preparation method thereof

[0050] The preparation of modified graphene oxide, the preparation of protein antifreeze agent, and the preparation method of lubricating oil suitable for elevator guide rails are the same as those in Example 1.

[0051] The difference lies in the differences in the components in the lubricating oil, which are as follows in this embodiment:

[0052] The composition includes the following components in parts by weight: 90 parts of base oil, 6 parts of modified graphene oxide, 7 parts of crystal anti-wear agent, 8 parts of nano-SiO2, 18 parts of sodium petroleum sulfonate, 1 part of protein antifreeze agent, 2 parts of polyoxyethylene polyoxypropanolamine ether and 1 part of 1-dodecylnaphthalene.

[0053] Example 4

[0054] Lubricating oil suitable for elevator guide rails and preparation method thereof

[0055] The preparation of modified graphene oxide and the preparation of protein antifreeze agent are the same as those in Example 1.

[0056] The difference is: the difference in the components of the lubricating oil, this embodiment is:

[0057] The composition includes the following components in parts by weight: 85 parts of base oil, 6 parts of modified graphene oxide, 7 parts of crystal anti-wear agent, 8 parts of nano-SiO2, 18 parts of sodium petroleum sulfonate, 1 part of protein antifreeze agent, 2 parts of polyoxyethylene polyoxypropanolamine ether and 1 part of 1-dodecylnaphthalene.

[0058] The difference also lies in that in the preparation method of the lubricating oil suitable for elevator guide rails, the reaction temperature in step S1 is 60°C, the reaction temperature in step S2 is 80°C, and the other process conditions are the same as those in Example 1.

[0059] Example 5

[0060] Lubricating oil suitable for elevator guide rails and preparation method thereof

[0061] The preparation of modified graphene oxide, the preparation of protein antifreeze agent, and the preparation method of lubricating oil suitable for elevator guide rails are the same as those in Example 1.

[0062] The difference lies in the differences in the components in the lubricating oil, which are as follows in this embodiment:

[0063] The composition includes the following components in parts by weight: 100 parts of base oil, 6 parts of modified graphene oxide, 7 parts of crystal anti-wear agent, 10 parts of nano-SiO2, 18 parts of sodium petroleum sulfonate, 1 part of protein antifreeze agent, 2 parts of polyoxyethylene polyoxypropanolamine ether and 2 parts of 1-dodecylnaphthalene.

[0064] Example 6

[0065] Performance Testing

[0066] Anti-aging and antifreeze performance tests

[0067] The lubricating oils suitable for elevator guide rails obtained in Examples 1 to 5 were respectively coated on the elevator guide rail materials with a coating thickness of 1.0 to 2.0 mm. The anti-aging and antifreeze properties of the elevator guide rail materials were tested and compared with the test results of the elevator guide rail materials not coated with lubricating oil as comparative example 1. The results are shown in Table 1.

[0068] Table 1 Test results of anti-aging performance and antifreeze performance

[0069]

[0070] According to the above test results, it can be seen that the elevator guide rail lubricating oil provided by the present invention can effectively improve the elongation and tensile strength of the elevator guide rail, and can effectively improve the anti-aging performance of the elevator guide rail material; from the V-type impact energy performance test results, it can be seen that the elevator guide rail lubricating oil provided by the present invention can effectively improve the antifreeze performance of the elevator guide rail material.

[0071] The lubricating oil for elevator guide rails obtained in Examples 1 to 5 was subjected to an antifreeze test, and the test results are as follows:

[0072] Table 2 Antifreeze test results

[0073]

[0074] In the above test results, the lower the freezing point, the better the antifreeze performance of the lubricating oil. Therefore, the lubricating oil suitable for elevator guide rails of the present invention has good antifreeze performance.

[0075] Rust resistance and oxidation stability testing

[0076] The lubricating oils for elevator guide rails obtained in Examples 1 to 5 were tested for rust resistance and oxidation stability as compared with the test results of the elevator guide rail material not coated with lubricating oil as Comparative Example 1. The test results are shown in Table 3.

[0077] Table 3 Rust resistance and oxidation stability test results

[0078]

[0079] From the test results of rust resistance and oxidation stability, it can be seen that the elevator guide rail lubricating oil provided by the present invention has good rust resistance and high oxidation stability, indicating good oxidation resistance and long service life.

[0080] The above-mentioned embodiments only express the implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A lubricating oil suitable for elevator guide rails, characterized in that: Calculated by weight, the composition includes: 80-100 parts of base oil, 5-10 parts of modified graphene oxide, 5-10 parts of crystal anti-wear agent, 5-8 parts of nano ZnO or nano SiO2, 15-20 parts of sodium petroleum sulfonate, 1-2 parts of protein antifreeze agent, 2-3 parts of polyoxyethylene polyoxypropanolamine ether and 1-2 parts of 1-dodecylnaphthalene.

2. The lubricating oil according to claim 1, characterized in that: The base oil comprises 45% to 50% of Class III base oil, 30% to 35% of dipropylene glycol dibenzoate and 10% to 15% of trimethylolethane trinitrate, and also comprises 1 to 2 parts by weight of zinc dialkyl dithiophosphate.

3. The lubricating oil according to claim 1, characterized in that: The specific preparation method of the modified graphene oxide is as follows: Graphene oxide and compounds containing boron, molybdenum, calcium, copper and rare earth elements are added into a container, and then added into petroleum ether, stirred and heated, and then concentrated sulfuric acid is added as a catalyst and reacted, and the temperature is raised to the boiling point of the solvent to evaporate the solvent, and the product is placed in a vacuum drying oven to dry, so as to obtain a modified graphene oxide anti-wear agent.

4. The lubricating oil according to claim 1, characterized in that: The preparation method of the protein antifreeze agent is as follows: Dissolve sericin with water, adjust the pH to 7.0-9.0 with NaOH solution, and maintain the temperature at 20-40°C; add trypsin to perform enzymatic hydrolysis for 2-3 hours. After the enzymatic hydrolysis is completed, heat the solution to 80-100°C and maintain it for 5-10 minutes to inactivate the enzyme; freeze-dry the obtained polypeptide solution to obtain a protein antifreeze agent.

5. The method for preparing the lubricating oil according to claim 1, characterized in that: The steps are as follows: S1. The temperature of the reactor is controlled at 60-70 ° C, the first anti-wear agent, the second anti-wear agent, the anti-aging agent and the rust inhibitor are added to the reactor, and the reaction is stirred, and the material is placed in an ultrasonic instrument for ultrasonic dispersion for 1 to 2 hours. After the dispersion is complete, the solution is taken out for use; S2. Add a pour point depressant and an antifoaming agent to the solution obtained in step S1, raise the temperature to 80 to 90° C., stir for 20 min, and obtain a mixed solution; S3. The mixed solution obtained in step S2 is cooled to room temperature, a protein antifreeze agent is added thereto, and ultrasonic dispersion is performed for 30 to 50 minutes to obtain the lubricating oil for the elevator guide rail.

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